Early adopters take note. The Firefox 3 development team has released a new alpha version of the upcoming Firefox 3 web browser codename Gran Paradiso. The new version of Firefox 3
can be downloaded right from the webpage where the developers made the announcement. Versions for Windows, Macintosh and Linux are available. It should be noted that this version is for testing purposes only and mainly intended for web developers and the testers who test the alpha version for bugs.
Although I decided to install the new version of Firefox in a separate directory it was using the same profile folder that I was using for Firefox 2. Gran Paradiso performed a check for every extension installed and non was reported to be working. It is still possible to use the nightly tester tools for instance to get those extensions working with Firefox 3.
You should take a look at the release notes
to find information about installation, bugs and read the frequently asked questions. I was not able to spot odd behavior so far but I did not activate my extensions for now. Everything looks identical to Firefox 2 at this point and I would suggest to wait with the installation unless you really need to test a website for compatibility.